/*!
 * Crypto-JS v1.1.0
 * http://code.google.com/p/crypto-js/
 * Copyright (c) 2009, Jeff Mott. All rights reserved.
 * http://code.google.com/p/crypto-js/wiki/License
 */

const Crypto = require('./crypto.js');

(function () {
	// Shortcut
	var util = Crypto.util;

	Crypto.HMAC = function (hasher, message, key, options) {
		// Allow arbitrary length keys
		key = key.length > hasher._blocksize * 4 ? hasher(key, { asBytes: true }) : util.stringToBytes(key);

		// XOR keys with pad constants
		var okey = key,
			ikey = key.slice(0);
		for (var i = 0; i < hasher._blocksize * 4; i++) {
			okey[i] ^= 0x5c;
			ikey[i] ^= 0x36;
		}

		var hmacbytes = hasher(util.bytesToString(okey) + hasher(util.bytesToString(ikey) + message, { asString: true }), {
			asBytes: true
		});
		return options && options.asBytes
			? hmacbytes
			: options && options.asString
			? util.bytesToString(hmacbytes)
			: util.bytesToHex(hmacbytes);
	};
})();

module.exports = Crypto;
